Home / 270.37-405.51-87.78

Finding the Fourth Proportional to 270.37, 405.51 and 87.78

Calculator

Solution

The fourth proportional to 270.37, 405.51 and 87.78 is: 131.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.37 : 405.51 = 87.78 : x
  2. Step 2: Convert to fraction form
    270.37/405.51 = 87.78/x
  3. Step 3: Cross multiply
    270.37x = 405.51 × 87.78
  4. Step 4: Simplify right side
    270.37x = 35,595.67
  5. Step 5: Solve for x
    x = 35,595.67/270.37
  6. Step 6: Final answer
    x = 131.66

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.